Driving connection for compressors.



N0. 683,9". Patented Oct. 8,190l. 0. H. CASTLE.- DRIVING CONNECTION FOR COMPRESSORS.

(Application filed Jan. 2, 1901.)

2 Sheets-Sheet I.

(No Model.)

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N0. 683,9". Patented Oct. 8, I90I. 0. H. CASTLE.

DRIVING CONNECTION FOR COMPBESSORS.

(Application filed Jan. 2, 1901.) (No Model.) 2 Sheets-Sheet 2.

OLIVER II. CASTLE, OF INDIANAPOLIS, INDIANA;

DRIVING CONNECTION FOR COMPRESSORS.

SPECIFICATICN forming part of Letters Patent No. 683,911, dated October 8, 1901. Application filed January 2, 1901- Serial No. 41,821. (No model.)

To all whom, it may concern:

Be it known that I, OLIVER H. CASTLE, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Driving Connection for Compressors, of which the following is a specification.

My invention relates to an improvement in compressors, particularly of that type used in ice-machines for the compression of ammonia.

The objects of my invention are to produce a machine in which the power-cylinder and compressor-cylinder are not in the same axial line, to provide an improved form of driving connection between the power-cylinder and compressor-cylinder, and to so arrange the several Wearing parts that they may be readily accessible, easily adjusted,- and easily disassembled.

The accompanying drawings illustrate my invention.

Figure 1 is a side elevation. Fig. 2 is a section through the cross-head centers of Fig. 1. Fig. 3 is a detail of the driving connections.

In thevdrawings, 5 indicates a supportingframe, preferably formed of a single casting, provided at one end with standards 6, which support suitable bearings for a crank-shaft 7. The frame 5 consists,essentially, of two parallel sides, and between these sides is supported a power-cylinder 8, provided with a reciprocating piston-rod 9. Supported upon frame 5, immediately above cylinder 8, is a com pressorcylinder 10, provided with a piston-rod 11. Mounted in front of cylinder 10 are two sets of cross-head guides 12 12, one member of each pair being adjustable toward and from the other in the usual well-known manner. Mounted so as to reciprocate within and between guides 12 12 is a cross-head 13, which is secured to the projecting end of the pistonrod 11. Cross-head 13 is provided with a pin 14, to which is pivoted one end of the pitman 15, the opposite end being pivoted to the crank 7. Cross-head 13 is provided on its under side with a pair of surfaces 16, Which are parallel to the axes of the two cylinders. Each side of the supporting-frame 5 below guides 12 12 is provided with projecting lugs 17, between which are supported cross-head guides 18, said guides being parallel to guides 12 and the axis of the power-cylinder. Mounted between each pair of guides 19 is a crosshead shoe 20, provided upon its inner end with flanges 21, which engage the side of guides 19. Each of the shoes 20 is provided with a transverse bore adapted to receive the reduced ends of a shaft 22, which extends between the two shoes. Secured to piston-rod 9 is a yoke 23, each member of which carries a bearing 24, through which the shaft 22 passes. Either pivoted upon or clamped to shaft 22 is one end of a second pitman 29, the other end of which is pivoted to the connecting-rod 15 at a point 30, which lies between the ends of said connecting-rod.

In the construction described there is a slight angular movement of pitman 29 with relation to rod 15, and there would be a tendency to cramp the cross-heads within their guides. In order to prevent this tendency, I pivot upon shaft 22, between the members of yoke 23, the lower arms of a sector 26, one upon each side of pitman 29. The upper end of sector 26 is bifurcated, so as to form a pair of arms 27, each of which is formed upon an arc of a circle struck from the center of shaft 22 and with a radius equal to the distance between said center and the surfaces.16 of cross-head 13. In order to prevent the dis placement of sectors 26, I provide each arm 27 thereof with a number of projecting teeth 28, which are adapted to cooperate with recesses formed in surfaces 16.

In operation power is transmitted through piston-rod 9 to the shaft 22 and by it through pitman 29 and pitman 15 to the crank-shaft,

this movement resulting in a reciprocation of cross-head 13 and piston-rod 11. As the crank advances around its center there is a gradual change of angle between pitman 15 and pitman 29, the stroke of the power-piston being considerably in excess of the resultant stroke of the compressor-piston. The relative movement between the two crossheads results in a swing or movement of sector 26, said sector being, however, always in contact with surfaces 16, and thus preventing any tendency of tho cross-heads to cramp in their guides.

It will be readily understood that instead of the sector shown a strut may be substi- IOO tuted, said strut being provided either with a roller or a shoe upon its upper end in posiiion to contact with the surfaces 16.

To dismount the parts, guides 19 are first detached, so as to allow the removal of shoes 21, When shaft 20 may be easily withdrawn. The lower cross-head guides are outside of the bed-frame and are thus easily watched and attended.

I claim as my invention- 1. The combination with a pair of reciprocating heads movable along different lines, of a crank, a pitman connecting one of said heads to said crank, a second pitman connecting the second head and the first pitman, and a sector carried by said second head and arranged to roll upon the first head.

2. The combination with a pair of reciprocating heads movable along different lines, of a crank, a pitman connecting one of said heads to said crank, a second pitman con neciing the second head to the first pitman,

esaeii and a sector carried by one of said heads iii position to have rolling contact with the other head.

3. The combination with a pair of reciproeating heads movable along different lines, of a crank, a pitman connecting one of said heads to said crank, a second pitman connecting the second head to the first pitrnan, and a connecting-strut carried by one of said heads and having a movable contact with the other.

4;. In an engine, the combination with a pair of parallel cross-head guides, of a pair of shoes each provided on its inner side with a flange to engage its guide, a shaft extend ing between said shoes, and a connection be tween said shaft and the piston-rod of the engine.

OLIVER II. CASTLE.

\Vitnesses:

ARTHUR M. 1-1001), ISERTHA M. BALLARD. 

